EP2937194B1 - Method and facility for cutting a concrete product - Google Patents

Method and facility for cutting a concrete product Download PDF

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Publication number
EP2937194B1
EP2937194B1 EP15164046.3A EP15164046A EP2937194B1 EP 2937194 B1 EP2937194 B1 EP 2937194B1 EP 15164046 A EP15164046 A EP 15164046A EP 2937194 B1 EP2937194 B1 EP 2937194B1
Authority
EP
European Patent Office
Prior art keywords
hollow
concrete product
water jet
core concrete
jet cutting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP15164046.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2937194A1 (en
Inventor
Heikki Kankkunen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elematic Oyj
Original Assignee
Elematic Oyj
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elematic Oyj filed Critical Elematic Oyj
Publication of EP2937194A1 publication Critical patent/EP2937194A1/en
Application granted granted Critical
Publication of EP2937194B1 publication Critical patent/EP2937194B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/084—Producing shaped prefabricated articles from the material by vibrating or jolting the vibrating moulds or cores being moved horizontally for making strands of moulded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
    • B28B11/0863—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads for profiling, e.g. making grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/12—Apparatus or processes for treating or working the shaped or preshaped articles for removing parts of the articles by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
    • B28B11/16—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting for extrusion or for materials supplied in long webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/0036—Cutting means, e.g. water jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising

Definitions

  • the present invention relates to cutting of prefabricated concrete products. More precisely the present invention relates to a method and a facility for cutting cured slipform cast hollow-core concrete products with water jet cutting.
  • Prefabricated concrete elements such as hollow-core slabs and solid concrete slabs, are conventionally cast by slipform casting on long casting beds as a continuous casting process.
  • the length of said continuous casting process is defined either on the basis of the total length of the elements to be cast, or on the basis of the maximum length of the casting bed.
  • the length of casting beds used in slipform casting can be up to 150-200 m, depending on the size of the element plant.
  • the uniform cast element is cut, generally by sawing, into pieces with predetermined lengths on the basis of the design characteristics of the ready-made elements, and the cut concrete elements are lifted off the casting bed to storage, to wait for transportation to their appointed targets of usage.
  • slipform cast concrete elements are prestressed, i.e. they are provided with reinforcing wires. Moreover, after slipform casting, the cast concrete elements can be provided with different apertures or cavities, for example for lead-ins or other required post-casting build-up of the elements. Apart from regular concrete mass, the casting material of slipform cast concrete elements can be for example fiber reinforced concrete mass.
  • cured concrete elements For sawing cured concrete elements, there is usually employed a saw, or sawing equipment, with a diamond blade, because in hardness, cured concrete mass corresponds to rock material, and often it is also provided with reinforcing steel wires.
  • the sawing of a fresh, green element is also possible, but in that case the element to be sawed cannot contain reinforcing wires, or the sawing needs to be restricted in the areas not containing the reinforcing wires, because in a fresh element, the reinforcing wires would be detached from the cast element owing to their remarkable prestress, and this would lead to destructive results for the element.
  • Water jet cutting with abrasive water jet has also been experimented for cutting cured slipform cast products, but this is problematic for hollow-core slabs, since the hollow-core areas tends to break up the water jet and thus greatly decelerate the cutting process.
  • FI 101 692 B discloses a method and a facility for manufacturing hollow-core concrete products with reinforcements projecting from the end.
  • Patent publication US 5 035 100 A discloses a wall slab and building construction, where a hollow-core concrete product is slipform cast and in the concrete product is formed passages extending from the side surface of the product through the product and passing through and connecting the hollow-cores.
  • the location of the passage may be used for transverse cutting of the product, for example with water jet cutting.
  • the present invention provides a method for cutting a cured slipform cast hol-low-core concrete product with water jet cutting according to claim 1.
  • the water jet only needs to cut the lower portion of the cured hollow-core concrete product without any open areas, which significantly speeds up the cutting process. Further, the formation of the depressions or grooves is easily and quickly implemented to the fresh uncured hollow-core concrete product, when compared to a cured concrete product.
  • the depression or groove is preferably 10-70 mm deep, but may also extend close to the reinforcing wires of the slipform cast concrete product.
  • the width of the depression or groove is preferably 5-100 mm, but may also be greater.
  • Suitable water pressure for the water jet cutting of the cured hollow-core concrete product is about 3000 bar and water feed about 18 l/min.
  • Suitable amount of abrasive to be included in the water jet is about 0,5-1 kg/min.
  • the grooves can be provided for transverse cutting as well as longitudinal cutting of the hollow-core concrete product with a water jet cutting, and the depressions and/or grooves can be provided also for any and all other water jet cuttings.
  • the formed depressions or grooves in the concrete hollow-core product are preferably large enough to contain the nozzle of the water jet cutting device. This allows taking the nozzle close to the surface to be cut, which makes the water jet cutting process more efficient.
  • the forming of depressions or groves is implemented at casting place, i.e. on a slipform casting bed, and after the curing the hollow-core concrete product is transferred from the casting place to a separate workstation for the water jet cutting.
  • This allows the cured and at length cut hollow-core concrete products to be removed from the casting bed before carrying out the required water jet cutting procedures. Further, it allows the water jet cutting apparatus to be part of a stationary workstation.
  • the cured hollow-core concrete product may be turned over, which allows the water jet cutting from the opposite side of the hollow-core concrete product than the forming of the depressions or grooves. This level surface enhances further the water jet cutting procedure.
  • the present invention also provides a facility for cutting a slipform cast hollow-core concrete product with water jet according to claim 4.
  • the device for forming depressions and grooves preferably comprises a rotary elongate milling tool for milling the surface of the fresh cast hollow-core concrete product.
  • This milling type working of the fresh slipform cast concrete product works well with highly compacted and very dense fresh concrete mass obtained with extruder-type slipform casting process before curing of the concrete mass.
  • the facility of the invention comprises a separate workstation for water jet cutting of the cured hollow-core concrete product, and suitable devices, such as bridge cranes, for transferring the cured hollow-core concrete product to the separate workstation for water jet cutting.
  • the manufacturing facility 1 for casting and cutting slipform cast hollow-core concrete products shown in figure 1 comprises a plurality of slipform casting beds 2, a plurality of transfer beds 3 for moving cut hollow-core concrete products to a storage area, a storage area 4, bridge cranes 5, 6, 7 for lifting and transferring cast concrete products ad casting equipment, and water jet cutting station 8.
  • the slipform cast hollow-core concrete products are first cast as continuous slipform casting on the casting bed 2. After the casting, or during the casting process, depressions and/or grooves are formed on the top surface of the hollow-core concrete product at the predefined locations where lead-throughs or parts need to be cut away, or where other cuttings needs to be made.
  • the depressions and/or grooves are formed on the top surface of the fresh cast concrete product preferably with a separate slab processing machine moving on the same rails than the slipform casting machine.
  • the slab processing machine preferably comprises a movable rotary elongate milling tool for forming the depressions and/or grooves to the fresh concrete product.
  • the cast continuous hollow-core concrete product is left to cure on the casting bed 2.
  • the continuous hollow-core concrete product is cut to predefined lengths with suitable machinery, such as diamond bladed saw, on the casting bed 2, and the cut concrete products are transferred to the water jet cutting station 8 with bridge cranes 5 and 6.
  • the required lead-throughs and other cuttings are carried out with a water jet cutting device, in the areas of the formed depressions and grooves.
  • the water jet cutting can be carried out to the hollow-core concrete product from the same side as the formation of the grooves and depressions, or the hollow-core concrete product can be turned around so that the water jet cutting is carried out from opposite side of the concrete product.
  • the ready hollow-core product is lifted on to transfer beds 3 and moved to a storage area 4.
  • Figures 2A-2B show schematically an embodiment of the phases of the present invention for creating a lead-through in a hollow-core concrete product 21 as cross-sectional views.
  • Figure 2A shows a cross-section of the fresh slipform cast hollow-core concrete product 21 comprising cavities 22 and reinforcing wires 23.
  • transverse grooves 24 and longitudinal grooves 25, 25' which grooves restrict a rectangular area within the concrete product, as shown in figure 2B .
  • the grooves 24, 25, 25' extend at least in the area where the cavities 22 are located, and preferable even deeper, but still above the reinforcing wires 23.
  • the width of the grooves 24, 25, 25' is such, that a nozzle of a water jet cutting device can be placed within the grooves.
  • the hollow-core concrete product 21 is cured, the area of the concrete product defined by the grooves 24, 25, 25' is cut from the concrete product with water jet cutting.
  • the final hollow-core concrete product after water jet cutting is shown in figure 2C .
  • the water jet is strong enough to cut through the concrete as well as the reinforcing wires 23, but the cutting speed needs generally be slowed down for cutting of the reinforcing wires.
  • Figures 3A-3C show schematically an embodiment of the phases of the present invention for cutting a hollow-core concrete product 21 as side views.
  • the water jet cutting may be carried out either through the groove 24 or from opposite side of the concrete product at the location of the groove.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mining & Mineral Resources (AREA)
  • Manufacturing & Machinery (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
EP15164046.3A 2014-04-22 2015-04-17 Method and facility for cutting a concrete product Not-in-force EP2937194B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20145371A FI127903B (en) 2014-04-22 2014-04-22 Method and plant for cutting a concrete product

Publications (2)

Publication Number Publication Date
EP2937194A1 EP2937194A1 (en) 2015-10-28
EP2937194B1 true EP2937194B1 (en) 2018-10-31

Family

ID=53015524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15164046.3A Not-in-force EP2937194B1 (en) 2014-04-22 2015-04-17 Method and facility for cutting a concrete product

Country Status (6)

Country Link
US (1) US10022892B2 (ru)
EP (1) EP2937194B1 (ru)
CN (1) CN105014779A (ru)
ES (1) ES2708027T3 (ru)
FI (1) FI127903B (ru)
RU (1) RU2687708C2 (ru)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102191233B1 (ko) 2020-05-28 2020-12-15 주식회사 삼우피씨에스 폭이 상이한 중공슬래브를 제조할 수 있는 중공슬래브 제조장치

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US4272230A (en) * 1975-09-05 1981-06-09 Solai Vignola Di Faviani Orlando Ec Societa Slip form for building components
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JPH0516120A (ja) 1991-07-11 1993-01-26 Mitsubishi Materials Corp 鉄筋補強押出成形生製品の切断方法
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Also Published As

Publication number Publication date
FI20145371A (fi) 2015-10-23
ES2708027T3 (es) 2019-04-08
RU2687708C2 (ru) 2019-05-15
CN105014779A (zh) 2015-11-04
EP2937194A1 (en) 2015-10-28
RU2015113958A3 (ru) 2018-10-17
RU2015113958A (ru) 2016-11-10
US10022892B2 (en) 2018-07-17
FI127903B (en) 2019-05-15
US20150298350A1 (en) 2015-10-22

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